10,000 BTU U-shaped window air conditioner
GREE GJC10BU-A6DRNJ2A
Below average efficiency for its size: a CEER of 14.7 ranks #26 of 28 10,000 BTU window air conditioners.
It cools a room of about 350-450 sq ft, draws about 680 watts and costs about $92 a year to run at typical U.S. use and prices.
- CEER
- 14.7 Combined efficiency, higher is betterBelow average · beats 11%
- Cooling
- 10,000 BTU/hFor about 350-450 sq ft
- Energy use
- 510 kWh/yr35% less than the federal minimum
- Unit size
- 21" wide 13" high, 18" deep, 65 lb
A good fit if…
- You want a quieter room and a usable window - the window closes into the U, so the compressor sits outside the glass.
- You want to plug it into an ordinary outlet - it runs on 115 V.
Think twice if…
- Running cost matters most - its CEER is below average for 10,000 BTU window air conditioners.
- You also need heat - it cools only.
Calculate my running costCheck the size for my room
Details
Specifications
| General | |
|---|---|
| Brand | GREE |
| Also sold as | HOUSE KOBO |
| Model number | GJC10BU-A6DRNJ2A |
| Type | Window |
| Design | U-shaped (window closes through it) |
| Heating | No, cooling only |
| Compressor | Variable speed (inverter) |
| Voltage | 115 V (standard outlet) |
| Refrigerant | R-32 (GWP 675) |
| Support bracket included | Yes |
| On the market since | November 28, 2024 |
| Last certified | August 2, 2025 |
| Performance | |
| Cooling capacity | 10,000 BTU/h |
| CEERCombined energy efficiency ratio, includes standby power | 14.7 |
| Yearly energy useENERGY STAR test: 750 hours | 510 kWh |
| Better than federal minimum | 35% less energy |
| ENERGY STAR Most Efficient | No |
| Size | |
| Width × height × depth | 21" W × 13" H × 18" D |
| Weight | 65 lb |
How it compares with 27 other 10,000 BTU window units
- CEER (class median 15.0)14.7, tied with 1 other
- Yearly cost vs. class median ($90)$2 more
- Width 21" (class median 19.8")narrower than 37%
- Weight 65 lb (class median 58 lb)lighter than 33%
- Rank among 9 similar designs (U-shaped)#9
Compared with the other ENERGY STAR certified 10,000 BTU window units. Yearly cost at 750 hours and 18.0¢/kWh.
Same unit, other model numbers
These model numbers have the same capacity, efficiency, energy use, dimensions and weight as the GREE GJC10BU-A6DRNJ2A: the same unit under another brand, or with a colour or retailer code. Everything on this page applies to them.
- HOUSE KOBO KOBOGJC10BU
Questions
- How many square feet does the GREE GJC10BU-A6DRNJ2A cool?
- At 10,000 BTU/h it suits a room of about 350 to 450 sq ft with normal sun and two people, following the ENERGY STAR sizing guide. In a heavily shaded room that stretches to about 385-495 sq ft; in a very sunny one it shrinks to 315-405 sq ft. A kitchen needs 4,000 BTU more.
- How many watts and amps does the GREE GJC10BU-A6DRNJ2A use?
- About 680 watts at full power (10,000 BTU/h divided by its CEER of 14.7), which is 5.9 amps at 115 V. That is 13 W more than the typical unit in its class (667 W), or $2 a year dearer to run at 18.0¢/kWh. Its inverter compressor slows down instead of cycling, so real use is usually lower. Its CEER beats 7% of the 28 units in the class.
- Can the GREE GJC10BU-A6DRNJ2A run on a standard outlet?
- Yes. It runs on 115 V and draws about 5.9 A, well inside a standard 15 A outlet, but do not share the circuit with a space heater, microwave or other big load. Every certified unit in this class is 115 V.
- What are the dimensions of the GREE GJC10BU-A6DRNJ2A, and will it fit my window?
- 21" W × 13" H × 18" D, 65 lb. It is narrower than 37% of its 27 competitors and lighter than 33% of them. The window closes into the U-shaped slot, so measure the opening height as well as the width: you need at least the unit's 21" width between the frame sides.
- Is the GREE GJC10BU-A6DRNJ2A U-shaped design an advantage?
- Mostly yes. The sash closes into the unit, so the window stays sealed and daylight comes in, and the compressor is outside the glass, which cuts noise indoors. The trade-off is a window that must slide up and down, and a few extra steps to fit the foam seals.
- Can the GREE GJC10BU-A6DRNJ2A also heat the room?
- No, it only cools. If you also need heat, 6 certified units in this class can do both; see the list of air conditioners with heat.
- Is the GREE GJC10BU-A6DRNJ2A worth buying to replace an old air conditioner?
- An old unit of the same size at 9 CEER would cost about $150 a year to run at 750 hours and 18.0¢/kWh; this one costs about $92, so it saves roughly $58 a year.
- Is the GREE GJC10BU-A6DRNJ2A the same as the HOUSE KOBO KOBOGJC10BU?
- As far as the certified data goes, yes. ENERGY STAR lists both model numbers with the same capacity, efficiency, energy use, dimensions and weight, which means the same unit sold under another brand or with a different colour or retailer code. The full list is on this page.
Running cost calculator
Pre-filled with this model. Pick your state and how many hours you run it, or see the yearly cost in every state.
Closest alternatives
Units with a similar CEER in the same class, and what sets each one apart from the GREE GJC10BU-A6DRNJ2A.
| Model | CEER | Compared with this one |
|---|---|---|
| GE Profile PHNT10CCH1 | 14.7 | same CEER, 1.3" narrower, 15 lb heavier, saddle design |
| Friedrich CCV10A10A | 15.0 | 0.3 CEER higher, 7 lb lighter, standard box |
| LG LW1022FVSM | 15.0 | 0.3 CEER higher, 1.4" narrower, saddle design |
| Windmill 10W2Wi | 15.0 | 0.3 CEER higher, 1.7" narrower, standard box |
| Midea MAW10V1UWT | 15.0 | 0.3 CEER higher, 1.8" narrower, 11 lb lighter, standard box |
See all 28 10,000 BTU window air conditioners, ranked
Source: ENERGY STAR Certified Room Air Conditioners (U.S. EPA), certification of August 2, 2025. How we use the data.